Device for drilling brush backs longitudinally



March 6,1928. 1,661,700

A. MERTES DEVICE FOR DRILLING BRUSH BACKS LONGITUDINALLY Filed March 5,1924 2 Sheets-Sheet 1 March 6," 1928.

A. MERTES DEVICE FOR DRILLING BRUSH BACKS LONGITUDINALLY 2 Shets-Sheet 2Filed March 5. 1924 Patented Mar. 6, 1928.

* esl e AUGUST names; or LAKEWOOD, 01310.;

were]: ron' DRiLLIne BRUSH BACKS honelronmanny.

Application filed March 5,1924. Serial No. 697,164.

The objects of the'invention are to provide means for drilling the longwooden backs of wire brushes longitudinally in order to connect theopenings in which the loops of tufts of brush wires areinserted so thatlocking wires or nails can be driven through the long rows of loops toretain'the'm in place.

Thedifiiculty of drilling such long openings in hard wood, which must,from the nature of thecase, be of very small diameter, is wellunderstood, since the drills unsupported will not be able to driil theholes required with any degree of accuracy, because they will not besuiliciently rigid for this purpose, owing to their extreme length.

To accomplish the desired results, the wooden back, after it has beenvertically drilled to form the openings thatreceive the looped wires, isplaced bottom up upon a platform, upon which spaced guide pins aresecured, that enter the socket openings forthe looped wires. These pinsare provided with registering openings that receive the drills and keepthem in alignment with the vertical openings.

The invention includes a platform, provided with rows of longitudinallyand transversely spaced pins secured to its upper surface, said pins ineach row being provided with registering horizontal openings. 1

It includes opposed groups of drills, positioned to pass through thewooden brush and through the horizontal openings in the vertical guidepins, which enter the vertical openings in the brush back inverted overthem. i

It includes two opposed sets of drills and means for revolving thedrills in each set at an equal rate of speed, and means forsimultaneously forcing them through, the wood, and also includesautomatically acting means for removing the drills from the work, and acommon source of power for the drills.

The advantages of the device are obvious, since by its use only a fewlocking wires will be required to hold the wire tufts in place, and themechanism required to drill the openings and to cut and feed the lockingwires will be much simplified.

The invention is illustrated in the accompanying drawings, hereinaftermore fully described and specifically pointed out in the claims.

In the accompanying drawings, 1 is a side elevation of the device,showing the tufts of wire.

is attached at 20. A screw 23 secures the mode of feeding the gangs ofdrills simuling them from the work.

Fig. 2 is a plan ofthe pin supporting plate, showing the positions ofthe drills. Fig. 3 is a longitudinal section thereof; Fig.

' taneously forrevolving them, and for remov- 4 is a bottom plan of thedrill holding head and Fig. 5 is a perspective of one of the holdingpins for the brush back.

In these views, 1' represents a table in 5 which rows of verticalguidepins, 2, 2, are secured in parallel horizontal and transverse rows, V c

3 is the brush back, inwhich vertical openings, 4, 4:, are bored toreceive the looped Thepins, 2, 2, are spaced to enter the openings, 3,in the brush when the vbrush is turned face downward over them.

The guide pins in each row are provided with aligned openings, 5,through which elongated drill rods, 6, 6, pass from opposite ends of thebrush back, and are guided accurately therein.

base 1 towards the ends of the brushes by means of chains or otherflexible draw means, 15, 15, an intermediate Windlass, 16, and crank,17.

The crank is turned until the gangs of drills nearly meet each otherthrough the wood, and counter-weights, 18, 18, return the drills andheads to their original positions.

The brush back is then removed and another put in its place.

The limitof movement of the drills is adjusted by means of a. disc 19revolvable in the head to one edge of which the chain 15 disc inadjusted position.

Having described theinvention, what I claim as new and desire to secureby Letters Patent is:

1,. In a device for drilling in a longitudi- 110 nal direction a brushback, having lon itudinal rows of spaced vertical openings t ierein, abase plate, on which said brush back rests in inverted position, rows oflongitudinally and transversely spaced vertical guide pins,

projecting fromthe upper face of the base plate, the pins in eachlongitudinal row being provided with aligned transverse openings, a gangof drills operating at each end of said base plate to pass through saidtransverse openings in said rows of pins, a head in which each gang ofdrills is revolvable, means for revolving each gang of drills, and acommon source of power for said revolving means. 7

2. In a device for drilling in a longitudinal direction a brush back,having longitudinal rows of spaced vertical openings therein, a baseplate, on which said brush back rests in inverted position, rows oflongitudinally and transversely spaced vertical guide pins, projectingfrom the upper face of the base plate, the pins in each longitudinal rowbeing provided with aligned transverse open ings, a gang of drillsoperating at each end of said base plate to pass through said transverseopenings in said rows of pins, a

head in which each gang of drills is revolvable, means for revolvingeach gang of drills, and a common source of power, and means forpropelling said gangs of drills towards and from said brush back.

3. In a device for drilling in a longitudinal direction a brush back,having longitudinal rows of spaced vertical openings therein, a baseplate, on which said brush back rests in inverted position, rows oflongitudinally and transversely spaced vertical guide pins, projectingfrom the upper face of the base plate, the pins in each longitudinal rowbeing provided with aligned transverse openings, a gang of drillsoperating at each end of said base plate to pass, through saidtransverse openings in said rows of pins, a head in which each gang ofdrills is revolvahle, means for revolving each gang of drills, and acommon source of power for said revolving means, and means forsimultaneously moving said gangs of drills toward and into said brushback, and return means therefor.

In testimony whereof, I hereunto set my hand this 22nd day of October,1923.

AUGUST MERTES.

